Summary
Season 3 of Rainbow City plunges deeper into a world ravaged by the Adam Virus, where survivors cling to life inside militarized shelters and scientific research is their only hope. As tensions rise in the Yeouido Shelter, Dr. Seok Hwa is thrust into a dangerous investigation following the mysterious death of his predecessor.
While he races against time to decode a rapidly mutating virus, Major Kwak Soohwan—his assigned bodyguard—must navigate the blurred lines between duty, desire, and distrust. With political conspiracies brewing, rebels threatening the city’s fragile order, and the virus evolving beyond control, the duo is pulled into a web of secrets that could change everything. Season 3 raises the stakes, blending emotional tension, high-risk science, and apocalyptic intrigue in a gripping continuation of the story.